Funding round
Boom Series B
Boom, which works in supersonic aircraft manufacturing in Englewood, raised $300M in a Series B round announced on 9 Dec 2025, led by Darsana Capital Partners, at a $1.50B post-money valuation. 6 firms took part. It is Boom's fourth venture round on record; the one before was a Series A in Mar 2017.
$300M
Amount raised
$1.50B
Post-money valuation
6
Investors
1 lead
20%
Stake sold
new money over the post-money
Valuation
What this round says about the price
This round priced Boom at $1.50B after the new money. The $300M bought investors about 20% of the company. It came 105 months after Boom's Series A. It is 88% of the $342M Boom has raised in the venture rounds on record. No later venture round is on record for Boom.
Boom's funding rounds
Boom has 4 venture rounds on record and 2 other deals. This one is highlighted.
Investors
Who put money in
Darsana Capital Partners led the round with 5 other firms.
Lead investor
- Darsana Capital Partners new investor
Also in the round
- Altimeter backs 67 venture-backed companies new investor
- ARK Invest backs 29 venture-backed companies new investor
- Bessemer Venture Partners backs 412 venture-backed companies new investor
- Robinhood Ventures new investor
- Y Combinator backs 1,295 venture-backed companies new investor
Use of proceeds
What the money is for
According to the announcement, the money goes to product development and scaling operations.
- Product development
- Scaling operations
Comparable rounds
How it compares
9 Series B rounds in Aircraft Parts & Services within a year either side disclosed an amount; the median was $58M, and this round was 5.2 times the median. The closest in time, other companies' Series B rounds in Aircraft Parts & Services:
| Company | Announced | Amount | Post-money | Led by |
|---|---|---|---|---|
| Aircraft Parts & Services | 13 Jan 2026 | $175M | not disclosed | B Capital |
| Aircraft Parts & Services | 13 Nov 2025 | $42M | not disclosed | not named |
| Aircraft Parts & Services | 8 Apr 2026 | $58M | not disclosed | not named |
| Aircraft Parts & Services | 21 Aug 2025 | $24M | not disclosed | The Friedkin Group |
| Aircraft Parts & Services | 26 Jun 2025 | $100M | $890M | General Catalyst |
| Aircraft Parts & Services | 27 Aug 2026 | $240M | not disclosed | Mare Liberum and AE Industrial Partners |
| Aircraft Parts & Services | 21 Apr 2025 | $115M | not disclosed | Prysm Capital |
| Aircraft Parts & Services | 18 Aug 2026 | $19M | not disclosed | DiamondStream Partners |
Sources
Where this comes from
Reported by 7 sources.
Questions
Frequently asked
How much did Boom raise in its Series B round?
Boom raised $300M in its Series B round, announced in Dec 2025.
Who led Boom's Series B round?
Darsana Capital Partners led it, with Altimeter, ARK Invest, Bessemer Venture Partners, Robinhood Ventures and Y Combinator.
What was Boom's valuation at the Series B round?
$1.50B post-money.
How does it compare with other Series B rounds in Aircraft Parts & Services?
9 Series B rounds in Aircraft Parts & Services within a year either side disclosed an amount; the median was $58M, and this round was 5.2 times the median.